0

I found the AniMove plugin for QGIS to do the Home Range Analysis for Dolphins.

I load all the points of the sighting, and perform the task using the plugin. I got the contour as polyline, and heatmap as raster. But I have trouble understanding the meaning.

No matter what Utilization Distribution value I input in the parameters box, I get the same contour lines.

And I don't know what is the value in raster means. I tried to check the source code. It seems that the value is estimated by kernel-density estimate using Gaussian kernels. And the z value is further modified by Z = Z.clip(0) * 100.0 / Z.max().

Another user asked something similar as QGIS - Animove - how to show specific kernel density contours? where he asked how to show specific kernel density contours.

  • I have figured out some of the answers myself. First, the contour is in 10 incremental level. The inner contour is 10% homerange. The outer contour is 90% homerange. It seems that the plugin indeed calculate everything no matter what utilisation distribution value you plug in. The value in the raster is a bit tricky. First, it estimates the kernel density, called value Z. The normalised them by the max value. So, the 95% home range is actually represents by all raster value >=5. – JOHN Feb 26 at 1:22

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.